// DirectoryInfoTest.cs - NUnit Test Cases for System.IO.DirectoryInfo class
//
// Authors
//	Ville Palo (vi64pa@koti.soon.fi)
//	Sebastien Pouliot  <sebastien@ximian.com>
// 
// (C) 2003 Ville Palo
// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
// 

using NUnit.Framework;
using System;
using System.Collections;
using System.IO;

namespace MonoTests.System.IO
{
	[TestFixture]
    	public class DirectoryInfoTest : Assertion
    	{
		string TempFolder = Path.Combine (Path.GetTempPath (), "MonoTests.System.IO.Tests");

		static readonly char DSC = Path.DirectorySeparatorChar;
		string current;

        	[SetUp]
        	protected void SetUp ()
		{
			current = Directory.GetCurrentDirectory ();
			if (Directory.Exists (TempFolder))
				Directory.Delete (TempFolder, true);
			Directory.CreateDirectory (TempFolder);
        	}
        
        	[TearDown]
        	protected void TearDown ()
		{
			if (Directory.Exists (TempFolder))
				Directory.Delete (TempFolder, true);
			Directory.SetCurrentDirectory (current);
		}
        
        	[Test]
        	public void Ctr ()
        	{
        	    	string path = TempFolder + DSC + "DIT.Ctr.Test";
        		DeleteDir (path);
            	
        	    	FileInfo info = new FileInfo (path);
        	    	AssertEquals ("test#01", true, info.DirectoryName.EndsWith (".Tests"));
        	    	AssertEquals ("test#02", false, info.Exists);
        	    	AssertEquals ("test#03", ".Test", info.Extension);
        	    	AssertEquals ("test#05", "DIT.Ctr.Test", info.Name);            
        	}

        	[Test]
        	[ExpectedException(typeof(ArgumentNullException))]
        	public void CtorArgumentNullException ()
        	{
        	    	DirectoryInfo info = new DirectoryInfo (null);            
        	}

        	[Test]
        	[ExpectedException(typeof(ArgumentException))]
        	public void CtorArgumentException1 ()
        	{
        	    	DirectoryInfo info = new DirectoryInfo ("");            
        	}

        	[Test]
        	[ExpectedException(typeof(ArgumentException))]
        	public void CtorArgumentException2 ()
        	{
        	    	DirectoryInfo info = new DirectoryInfo ("   ");            
        	}

        	[Test]
        	[ExpectedException(typeof(ArgumentException))]
        	public void CtorArgumentException3 ()
        	{
            	string path = "";
            	foreach (char c in Path.InvalidPathChars) {
                	path += c;
            	}
            	DirectoryInfo info = new DirectoryInfo (path);
        	}
        	        	
        	[Test]
        	public void Exists ()
        	{
            	string path = TempFolder + DSC + "DIT.Exists.Test";
            	DeleteDir (path);
            
            	try {
            	    	DirectoryInfo info = new DirectoryInfo (path);
                	AssertEquals ("test#01", false, info.Exists);
            
                	Directory.CreateDirectory (path);
                	AssertEquals ("test#02", false, info.Exists);
                	info = new DirectoryInfo (path);
                	AssertEquals ("test#03", true, info.Exists);            
            	} finally {
                	DeleteDir (path);
            	}
        	}
        	
        	[Test]
        	public void Name ()
        	{
        		string path = TempFolder + DSC + "DIT.Name.Test";
        		DeleteDir (path);
        		
        		try {
        			DirectoryInfo info = new DirectoryInfo (path);        			
        			AssertEquals ("test#01", "DIT.Name.Test", info.Name);
        			
        			info = Directory.CreateDirectory (path);
        			AssertEquals ("test#02", "DIT.Name.Test", info.Name);
        			
        			
        		} finally {
        			DeleteDir (path);
        		}        		           
        	}
        	
        	[Test]
        	public void Parent ()
        	{
        		string path = TempFolder + DSC + "DIT.Parent.Test";
        		DeleteDir (path);
        		
        		try {
        			DirectoryInfo info = new DirectoryInfo (path);
        			AssertEquals ("test#01", "MonoTests.System.IO.Tests", info.Parent.Name);
        			
        			info = Directory.CreateDirectory (path);
        			AssertEquals ("test#02", "MonoTests.System.IO.Tests", info.Parent.Name);
        			        			
        		} finally {
        			DeleteDir (path);
        		}        		                   	
        	}

        	[Test]
        	public void Create ()
        	{
            	string path = TempFolder + DSC + "DIT.Create.Test";
            	DeleteDir (path);
            
            	try {
                	DirectoryInfo info = new DirectoryInfo (path);
                	AssertEquals ("test#01", false, info.Exists);
                	info.Create ();                
                	AssertEquals ("test#02", false, info.Exists);
                	info = new DirectoryInfo (path);
                	AssertEquals ("test#03", true, info.Exists);
            	} finally {
                	DeleteDir (path);
            	}
        	}

		[Test]
		public void CreateSubdirectory ()
		{
			string sub_path = Path.Combine ("test01", "test02");
			try {
				DirectoryInfo info = new DirectoryInfo (TempFolder);
				info.CreateSubdirectory (sub_path);
				Assert ("test#01", Directory.Exists (Path.Combine (TempFolder, sub_path)));
			} finally {
				DeleteDir (Path.Combine (TempFolder, sub_path));
			}
				
		}
		
		[Test]
		[ExpectedException(typeof(ArgumentException))]
		public void CreateSubdirectoryEmptyString ()
		{
			new DirectoryInfo (".").CreateSubdirectory ("");
		}

		[Test]
		public void Delete1 ()
		{
            	string path = TempFolder + DSC + "DIT.Delete1.Test";
            	DeleteDir (path);
			
			try {
				Directory.CreateDirectory (path);
				DirectoryInfo info = new DirectoryInfo (path);
				AssertEquals ("test#01", true, info.Exists);
				
				info.Delete ();
				AssertEquals ("test#02", true, info.Exists);
				
				info = new DirectoryInfo (path);
				AssertEquals ("test#03", false, info.Exists);
			} finally {
				DeleteDir (path);
			}
		}

		[Test]
		public void Delete2 ()
		{
            	string path = TempFolder + DSC + "DIT.Delete2.Test";
            	DeleteDir (path);
			
			try {
				Directory.CreateDirectory (path);
				File.Create (path + DSC + "test").Close ();
				DirectoryInfo info = new DirectoryInfo (path);
				AssertEquals ("test#01", true, info.Exists);
				
				info.Delete (true);
				AssertEquals ("test#02", true, info.Exists);
				
				info = new DirectoryInfo (path);
				AssertEquals ("test#03", false, info.Exists);
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		[ExpectedException (typeof (IOException))]
		public void DeleteIOException1 ()
		{
            	string path = TempFolder + DSC + "DIT.DeleteIOException1.Test";
            	DeleteDir (path);			
			
			try {
				Directory.CreateDirectory (path);
				File.Create (path + DSC + "test").Close ();
				DirectoryInfo info = new DirectoryInfo (path);
				info.Delete ();
			} finally {
				DeleteDir (path);
			}
		}

		[Test]
		[ExpectedException (typeof (IOException))]
		public void DeleteIOException2 ()
		{
            	string path = TempFolder + DSC + "DIT.DeleteIOException2.Test";
            	DeleteDir (path);			
			
			try {
				Directory.CreateDirectory (path);
				File.Create (path + DSC + "test").Close ();
				DirectoryInfo info = new DirectoryInfo (path);
				info.Delete (false);
			} finally {
				DeleteDir (path);
			}
		}

		[Test]
		// from bug #75443
		public void FullName ()
		{
			DirectoryInfo di = new DirectoryInfo ("something");
			Assert ("Exists", !di.Exists);
			Assert ("FullName", di.FullName.EndsWith ("something"));

			di = new DirectoryInfo ("something" + Path.DirectorySeparatorChar);
			AssertEquals ("DirectorySeparatorChar", Path.DirectorySeparatorChar, di.FullName [di.FullName.Length - 1]);

			di = new DirectoryInfo ("something" + Path.AltDirectorySeparatorChar);
			AssertEquals ("AltDirectorySeparatorChar", Path.DirectorySeparatorChar, di.FullName [di.FullName.Length - 1]);
		}

		[Test]
		public void FullName_RootDirectory ()
		{
			DirectoryInfo di = new DirectoryInfo (String.Empty + Path.DirectorySeparatorChar);
			if (Path.DirectorySeparatorChar == '/') {
				// can't be sure of the root drive under windows
				AssertEquals ("FullName", "/", di.FullName);
			}
			AssertNull ("Parent", di.Parent);

			di = new DirectoryInfo (String.Empty + Path.AltDirectorySeparatorChar);
			if (Path.DirectorySeparatorChar == '/') {
				// can't be sure of the root drive under windows
				AssertEquals ("FullName-Alt", "/", di.FullName);
			}
			AssertNull ("Parent-Alt", di.Parent);
		}
		
		[Test]
		public void GetDirectories1 ()
		{
			string path = TempFolder + DSC + "DIT.GetDirectories1.Test";
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				AssertEquals ("test#01", 0, info.GetDirectories ().Length);
				
				Directory.CreateDirectory (path + DSC + "1");
				Directory.CreateDirectory (path + DSC + "2");				
				File.Create (path + DSC + "filetest").Close ();
				AssertEquals ("test#02", 2, info.GetDirectories ().Length);
				
				Directory.Delete (path + DSC + 2);
				AssertEquals ("test#02", 1, info.GetDirectories ().Length);				
				
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		public void GetDirectories2 ()
		{
			string path = TempFolder + DSC + "DIT.GetDirectories2.Test";
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				AssertEquals ("test#01", 0, info.GetDirectories ("*").Length);
				
				Directory.CreateDirectory (path + DSC + "test120");
				Directory.CreateDirectory (path + DSC + "test210");
				Directory.CreateDirectory (path + DSC + "atest330");
				Directory.CreateDirectory (path + DSC + "test220");
				Directory.CreateDirectory (path + DSC + "rest");
				Directory.CreateDirectory (path + DSC + "rest" + DSC + "subdir");
				File.Create (path + DSC + "filetest").Close ();
				
				AssertEquals ("test#02", 5, info.GetDirectories ("*").Length);
				AssertEquals ("test#03", 3, info.GetDirectories ("test*").Length);
				AssertEquals ("test#04", 2, info.GetDirectories ("test?20").Length);
				AssertEquals ("test#05", 0, info.GetDirectories ("test?").Length);
				AssertEquals ("test#06", 0, info.GetDirectories ("test[12]*").Length);
				AssertEquals ("test#07", 2, info.GetDirectories ("test2*0").Length);
				AssertEquals ("test#08", 4, info.GetDirectories ("*test*").Length);
#if NET_2_0
				AssertEquals ("test#09", 6, info.GetDirectories ("*", SearchOption.AllDirectories).Length);
#endif
				
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		[ExpectedException (typeof (DirectoryNotFoundException))]		
		public void GetDirectoriesDirectoryNotFoundException1 ()
		{
            	string path = TempFolder + DSC + "DIT.GetDirectoriesDirectoryNotFoundException1.Test";
            	DeleteDir (path);
			
			try {
				DirectoryInfo info = new DirectoryInfo (path);
				info.GetDirectories ();
			} finally {
				DeleteDir (path);
			}
		}

		[Test]
		[ExpectedException (typeof (DirectoryNotFoundException))]		
		public void GetDirectoriesDirectoryNotFoundException2 ()
		{
            	string path = TempFolder + DSC + "DIT.GetDirectoriesDirectoryNotFoundException2.Test";
            	DeleteDir (path);
			
			try {
				DirectoryInfo info = new DirectoryInfo (path);
				info.GetDirectories ("*");
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		[ExpectedException (typeof (ArgumentNullException))]
		public void GetDirectoriesArgumentNullException ()
		{
            	string path = TempFolder + DSC + "DIT.GetDirectoriesArgumentNullException.Test";
            	DeleteDir (path);
			
			try {
				DirectoryInfo info = new DirectoryInfo (path);
				info.GetDirectories (null);
			} finally {
				DeleteDir (path);
			}			
		}

		[Test]
		public void GetFiles1 ()
		{
            	string path = TempFolder + DSC + "DIT.GetFiles1.Test";
            	DeleteDir (path);
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				AssertEquals ("test#01", 0, info.GetFiles ().Length);
				File.Create (path + DSC + "file1").Close ();
				File.Create (path + DSC + "file2").Close ();
				Directory.CreateDirectory (path + DSC + "directory1");
				AssertEquals ("test#02", 2, info.GetFiles ().Length);
				                        
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		public void GetFiles2()
		{
            	string path = TempFolder + DSC + "DIT.GetFiles2.Test";
            	DeleteDir (path);
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				AssertEquals ("test#01", 0, info.GetFiles ("*").Length);
				File.Create (path + DSC + "file120file").Close ();
				File.Create (path + DSC + "file220file").Close ();
				File.Create (path + DSC + "afile330file").Close ();
				File.Create (path + DSC + "test.abc").Close ();
				File.Create (path + DSC + "test.abcd").Close ();
				File.Create (path + DSC + "test.abcdef").Close ();				
				Directory.CreateDirectory (path + DSC + "dir");
				
				AssertEquals ("test#02", 6, info.GetFiles ("*").Length);
				AssertEquals ("test#03", 2, info.GetFiles ("file*file").Length);
				AssertEquals ("test#04", 3, info.GetFiles ("*file*").Length);
				AssertEquals ("test#05", 2, info.GetFiles ("file?20file").Length);
				AssertEquals ("test#07", 1, info.GetFiles ("*.abcd").Length);
				AssertEquals ("test#08", 2, info.GetFiles ("*.abcd*").Length);				                        
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		[ExpectedException (typeof (DirectoryNotFoundException))]
		public void GetFilesDirectoryNotFoundException1 ()
		{
			string path = TempFolder + DSC + "DIT.GetFilesDirectoryNotFoundException1.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = new DirectoryInfo (path);
				info.GetFiles ();
				
			} finally {
				DeleteDir (path);
			}
		}

		[Test]
		[ExpectedException (typeof (DirectoryNotFoundException))]
		public void GetFilesDirectoryNotFoundException2 ()
		{
			string path = TempFolder + DSC + "DIT.GetFilesDirectoryNotFoundException2.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = new DirectoryInfo (path);
				info.GetFiles ("*");
				
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		[ExpectedException (typeof (ArgumentNullException))]
		public void GetFilesArgumentNullException ()
		{
			string path = TempFolder + DSC + "DIT.GetFilesArgumentNullException.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = new DirectoryInfo (path);
				info.GetFiles (null);				
			} finally {
				DeleteDir (path);
			}
		}
		
		[Test]
		public void MoveTo ()
		{
			string path1 = TempFolder + DSC + "DIT.MoveTo.Soucre.Test";
			string path2 = TempFolder + DSC + "DIT.MoveTo.Dest.Test";
			DeleteDir (path1);
			DeleteDir (path2);
			
			try {
				DirectoryInfo info1 = Directory.CreateDirectory (path1);
				DirectoryInfo info2 = new DirectoryInfo (path2);
				
				AssertEquals ("test#01", true, info1.Exists);
				AssertEquals ("test#02", false, info2.Exists);
												
				info1.MoveTo (path2);				
				AssertEquals ("test#03", true, info1.Exists);
				AssertEquals ("test#04", false, info2.Exists);
				
				info1 = new DirectoryInfo (path1);
				info2 = new DirectoryInfo (path2);
				AssertEquals ("test#05", false, info1.Exists);
				AssertEquals ("test#06", true, info2.Exists);
				
			} finally {
				DeleteDir (path1);
				DeleteDir (path2);
			}
		}

		[Test]
		[ExpectedException (typeof (ArgumentNullException))]
		public void MoveToArgumentNullException ()
		{
			string path = TempFolder + DSC + "DIT.MoveToArgumentNullException.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				info.MoveTo (null);
			} finally {
				DeleteDir (path);
			}
			
		}

		[Test]
		[ExpectedException (typeof (IOException))]
		public void MoveToIOException1 ()
		{
			string path = TempFolder + DSC + "DIT.MoveToIOException1.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				info.MoveTo (path);
			} finally {
				DeleteDir (path);
			}			
		}

		[Test]
		[ExpectedException (typeof (ArgumentException))]
		public void MoveToArgumentException1 ()
		{
			string path = TempFolder + DSC + "DIT.MoveToArgumentException1.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				info.MoveTo ("");
			} finally {
				DeleteDir (path);
			}			
		}

		[Test]
		[ExpectedException (typeof (ArgumentException))]
		public void MoveToArgumentException2 ()
		{
			string path = TempFolder + DSC + "DIT.MoveToArgumentException2.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				info.MoveTo ("    ");
			} finally {
				DeleteDir (path);
			}			
		}

		[Test]
		[ExpectedException (typeof (ArgumentException))]
		public void MoveToArgumentException3 ()
		{
			string path = TempFolder + DSC + "DIT.MoveToArgumentException3.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = Directory.CreateDirectory (path);
				info.MoveTo (Path.InvalidPathChars [0].ToString ());
			} finally {
				DeleteDir (path);
			}			
		}

		[Test]
		[ExpectedException (typeof (IOException))]
		public void MoveToIOException2 ()
		{
			string path = TempFolder + DSC + "DIT.MoveToIOException2.Test";
			DeleteDir (path);
			
			try {
				DirectoryInfo info = new DirectoryInfo (path);
				info.MoveTo (path);
			} finally {
				DeleteDir (path);
			}			
		}

        	private void DeleteDir (string path)
        	{
        		if (Directory.Exists (path))
        			Directory.Delete (path, true);
        	}
 
 		[Test]
#if TARGET_JVM
        [Category("NotWorking")]
#endif
		public void DirectoryNameWithSpace ()
		{
			// check for Unix platforms - see FAQ for more details
			// http://www.mono-project.com/FAQ:_Technical#How_to_detect_the_execution_platform_.3F
			int platform = (int) Environment.OSVersion.Platform;
			if ((platform == 4) || (platform == 128)) {
				DeleteDir ("this has a space at the end ");
				string path = Path.Combine (TempFolder, "this has a space at the end ");
				Directory.CreateDirectory (path);
				DirectoryInfo i = new DirectoryInfo (path);
				string dummy = null;
				foreach (FileInfo f in i.GetFiles ()) // This used to throw
					dummy = f.Name;
			}
		}

			[Test]
			public void LastWriteTime ()
			{
				DirectoryInfo info = new DirectoryInfo (TempFolder);
				info.LastWriteTime = new DateTime (2003, 6, 4, 6, 4, 0);

				DateTime time = Directory.GetLastWriteTime (TempFolder);
				AssertEquals ("test#01", 2003, time.Year);
				AssertEquals ("test#02", 6, time.Month);
				AssertEquals ("test#03", 4, time.Day);
				AssertEquals ("test#04", 6, time.Hour);
				AssertEquals ("test#05", 4, time.Minute);
				AssertEquals ("test#06", 0, time.Second);

				time = TimeZone.CurrentTimeZone.ToLocalTime (
					Directory.GetLastWriteTimeUtc (TempFolder));
				AssertEquals ("test#07", 2003, time.Year);
				AssertEquals ("test#08", 6, time.Month);
				AssertEquals ("test#09", 4, time.Day);
				AssertEquals ("test#10", 6, time.Hour);
				AssertEquals ("test#11", 4, time.Minute);
				AssertEquals ("test#12", 0, time.Second);
			}

			[Test]
			public void LastWriteTimeUtc ()
			{
				DirectoryInfo info = new DirectoryInfo (TempFolder);
				info.LastWriteTimeUtc = new DateTime (2003, 6, 4, 6, 4, 0);

				DateTime time = TimeZone.CurrentTimeZone.ToUniversalTime (
					Directory.GetLastWriteTime (TempFolder));
				AssertEquals ("test#1", 2003, time.Year);
				AssertEquals ("test#2", 6, time.Month);
				AssertEquals ("test#3", 4, time.Day);
				AssertEquals ("test#4", 6, time.Hour);
				AssertEquals ("test#5", 4, time.Minute);
				AssertEquals ("test#6", 0, time.Second);

				time = Directory.GetLastWriteTimeUtc (TempFolder);
				AssertEquals ("test#7", 2003, time.Year);
				AssertEquals ("test#8", 6, time.Month);
				AssertEquals ("test#9", 4, time.Day);
				AssertEquals ("test#10", 6, time.Hour);
				AssertEquals ("test#11", 4, time.Minute);
				AssertEquals ("test#12", 0, time.Second);
			}

			[Test]
#if TARGET_JVM
            [Category("NotWorking")]
#endif
			public void LastAccessTime ()
			{
				DirectoryInfo info = new DirectoryInfo (TempFolder);
				info.LastAccessTime = DateTime.Now;
			}

			[Test]
#if TARGET_JVM
            [Category("NotWorking")]
#endif
			public void LastAccessTimeUtc ()
			{
				DirectoryInfo info = new DirectoryInfo (TempFolder);
				info.LastAccessTimeUtc = DateTime.Now;
			}

			[Test]
#if TARGET_JVM
            [Category("NotWorking")]
#endif
			public void CreationTime ()
			{
				DirectoryInfo info = new DirectoryInfo (TempFolder);
				info.CreationTime = DateTime.Now;
			}

			[Test]
#if TARGET_JVM
            [Category("NotWorking")]
#endif
			public void CreationTimeUtc ()
			{
				DirectoryInfo info = new DirectoryInfo (TempFolder);
				info.CreationTimeUtc = DateTime.Now;
			}


		private void CheckName (string name)
		{
			DirectoryInfo di = new DirectoryInfo (name);
			AssertEquals (name + ".Name", "share", di.Name);
			AssertEquals (name + ".Parent.Name", "usr", di.Parent.Name);
		}

		[Test]
		public void Name_Bug76903 ()
		{
			CheckName ("/usr/share");
			CheckName ("/usr/share/");
			CheckName ("/usr/share/.");
			CheckName ("/usr/share/./");
			CheckName ("/usr/share/blabla/../");
			CheckName ("/usr/lib/../share/.");
		}

		[Test]
		public void Hang_76191 ()
		{
			// from bug #76191 (hangs on Windows)
			DirectoryInfo di = new DirectoryInfo (Environment.CurrentDirectory);
			Stack s = new Stack ();
			s.Push (di);
			while (di.Parent != null) {
				di = di.Parent;
				s.Push (di);
			}
			while (s.Count > 0) {
				di = (DirectoryInfo) s.Pop ();
				Assert (di.Name, di.Exists);
			}
		}

		private void WindowsParentFullName (string name, string expected)
		{
			DirectoryInfo di = new DirectoryInfo (name);
			if (di.Parent == null)
				AssertNull (name, expected);
			else
				AssertEquals (name, expected, di.Parent.FullName);
		}

		[Test]
		public void WindowsSystem32_76191 ()
		{
#if !TARGET_JVM
			// check for Unix platforms - see FAQ for more details
			// http://www.mono-project.com/FAQ:_Technical#How_to_detect_the_execution_platform_.3F
			int platform = (int) Environment.OSVersion.Platform;
			if ((platform == 4) || (platform == 128))
				return;
#endif

			Directory.SetCurrentDirectory (@"C:\WINDOWS\system32");
			WindowsParentFullName ("C:", "C:\\WINDOWS");
			WindowsParentFullName ("C:\\", null);
			WindowsParentFullName ("C:\\dir", "C:\\");
			WindowsParentFullName ("C:\\dir\\", "C:\\");
			WindowsParentFullName ("C:\\dir\\dir", "C:\\dir");
			WindowsParentFullName ("C:\\dir\\dir\\", "C:\\dir");
		}

		[Test]
		public void Parent_Bug77090 ()
		{
			DirectoryInfo di = new DirectoryInfo ("/home");
			if (Path.DirectorySeparatorChar == '\\') {
				Assert ("/home parent (Windows path)", di.Parent.Name.EndsWith (":\\"));
			}
			else
				AssertEquals ("/home parent", "/", di.Parent.Name);
			AssertNull ("/home parent parent", di.Parent.Parent);
		}
	}
}